Nonsiphoning swimming pool treatment system



June 13, 1939. EVERSQN 2,162,074

NONSIPHONING SWIMMING POOL TREATMENT SXYSTEM Filed April 22, 1956 f @filaarlfueraow Patented June 13, 1939 STATES a orrlca nousirnomuo 4 Claims.

This invention relates to a new and improved re-circulating system for swimming pools and similar devices. At the present time in swimming pool construction it is uniform practice 5 to re-circulate the water in the swimming pool, passing it through some kind of purification system or other. Frequently the re-circulated water is passed through an ultra violet ray puritying system. Frequently it 'is passed through W filters and similar devices. Very often it is passed through some mechanism whereby it is doctored with a suitable purifying solution. In all of these cases provision must be made to introduce into the system at some point in 15 the course of re-circulation fresh water from the main or city supply. Of course, it should be understood that very frequently only a small amount or new water need be injected'into the system in the course of many hours oi operation.

20 This necessityior introduction of new water has precipitated a very serious sanitation dimculty. In all apparatuses, such as swimming pools, bathtubs, sinks, drains and the like, much difficulty has been encountered due to the fact 25 that there is a, tendency for the impure water contained in. the receptacle or device to m siphoned back into the main water supply system through whatever means is used tor the. in-

troduction of fresh water from the-main. In so recent months this diiiiculty has been much pub licized in the case of bathroom-appliances. City health authorities throughout the country are presently devising special health regulations and specifications to overcome this danger.

as It is an object of the present invention, therefore, to overcome these dimculties in connection with swimming pool ire-circulating systems; to provide means for the introduction of fresh water into a swimming pool re-circulatlon sysso tem without possibility of having the same siphoned back into the water main; and to provide new and novel means for the introduction of purifying solutions without danger 'of [Siphoning back. 4

45 Numerous other objects and advantages will more fully appear during the course and progress of the following specification.

Figure 1 is an elevation view of a preferred embodiment of the present invention.

50 Figure 2 is a schematic arrangement showing the present invention in association with a swimming pool. Y

The preferred embodiment of the present invention shown in Figure 1, comprises a re-circu- 55 lation pump I which has an intake 2 and an out- (Ui. era-i1 let 3. Coupled to the intake of the pump is a supply line 3 through which the water withdrawn from'the swimming pool for re-circulation may flow downwardly into the pump. Coupled t the outlet 3 of the pump l is a swimming pool returnline 5 through which the water withdrawn and re-circulated is returned to the swimming pool. At this point of juncture between the return line 5 and the outlet 3 of the pump i is a take-oil t. Coupled to this takeoff b is an injector supply line 1. This injector supply line i should be of considerably smaller diameter and capacity than the return line 5. The injector supply line 1 passes around to the intake side of the pump where it is coupled to one side R3 of the injector 9. The other side it of the injector 9 is coupled to a throatpipe it whichpasses through a coupling it into the pump intake. It should be noted that this throat pipe ii runs'substantially past the point of juncture between the pump intake and the supply line i. The side arm portion B3 of the injector d is coupled to a hose l6 which may lead off to fresh water supply, or to fresh water supply and reagent, or to reagent solutionalone. depending upon the type of purifying system involved.

The hose M, as shown in Figure 2, passes to a tank it. This tank 05 is provided with an overflow it which is adapted to maintain a level of liquid in thetank l5 at a certain height. The tank 85 is supplied with fresh water, or solution in fresh water, or whatever may be necessary through the line I! which is controlled by the float ball valve mechanism It. It should be noted that the termination E9 of the line ii is located at a substantial distance below the top oi the tank i5 and above the highest possible liquid level in that tank. As shown in Figure 2, the swimming pool supply line 6 40 is connected to the swimming pool 20. The swimming pool return line 5 is connected to the swimming pool at some suitable point higher than the lowest point of the pool as shown in Figure 2. If necessary a valve 2| may be inserted in the hose ll whereby to control the amount. of fluidpassing therethrough.

In operation the pump will withdraw a substantially large amount of swimming pool water through the supply line 4 into the intake of the pump system and thereby increase the pressure thereof to return the same and force this water out through the outlet 3 into the return line 5. A small amount of this liquid heat created by the pump is diverted through the injector supply through the intake line! and around intotheiniector 8 side I of the iniector. In therethrough thisfluld heat creates a suctioninthe sidearm l3 oftheinjectorlwhich suction draws fluid through thehose it from the The amount. of fluid drawn through thhh semaybereeulated bythevalve II. This vfluid is drawn through the'side arm ll of the injector I and caused by the'action of the said injector to intermingle with thefluid through said iniector. The combinedfluids,

therefore are injected intothe throat II and thence into the intake of the pump where a complete admixture with'the pool water is accomplished. Thus if merely fresh water is desired, fresh water may beallowed to run into the tank it through the line l| until theproper evelisr'eached; The pp y will-be shutofl' by the float ball valve ll. Any excess of liquid in this tank will tend-to overflow through the overflow It and pass onto the sewer. when the level in the tank gets too low; obviously the float ball valve mechanism will cause the valve to open and water will-be permitted to flow into the tank through the line II until the desired level is ass-in reached. Since, the hose I4 is opened into the tank and controlled only byathe valve II it is obvious then that whenever the valve ii is open and the Pump operating, the suction created in the hose 14 by the injector 8 will cause thefluid in the tank II to flow therethrough and into the pump system whence it is circulation systun at its 'OIItIet side, injector.

means for introducing additional fluids into system in combination with the inletside of the pump, a supply tank for said additional fluids.

supply tank conduit means connecting the inl iector to the side of the re-circulation .system at its intake side and connected to the return side of the recirculation system at 'its outlet side, injector means for introducing additional fluids into the system and connected in an auxiliary line arranged in parallel relationship with the pump, a

supply tank for said additional fluids, said in-' jector being actuated by the re-circulation system to forcefully draw additional'fluid from the supply tank conduit and inject it into the system,

the tank adapted to limit an overflow conduit in the maximum liquid level in the tank, and fresh fluid supply means for said tank having its mouth located a substantial distance above the overflow means. i

3. In a swimming pool water re-circulation :0

system, an eillux means, a return means adapted to return water from the eiilux means to the pool,

=introduced into the swimming pool flow back into proper.

'It will be observed that. if anything happens to thepump, or the pump is shut down, or some accident takes place whereby these conditions may be produced, the possibility of siphoning will be entirely overcome by reason of the fact that the injector-mechanism, which is responsible for the. introductionv of fresh water-or solution into the swimming pool system, is rendered inoperable at theinsta'nt the pump becomes inoperable.

A second element of protection is provided in the overflow it. If for any reason swimming pool water gets into the hose I4 and tends to u it and thence into the tank ii, the only thing'- that can happen would be that the level in the would be raised above the openinginto the overflow line It so that any .wat'er running back into'this tank from the.

swimming. pool would be drained oil. through this overflow line. o

It is thought that the invention and numerous of its attendant advantages will be understood from the foregoing description and it is obvious that numerous changes may be made in the form, construction and t of the several parts without departing from the spirit orscopeofthe invention,or anyof its attendant advantages, the form herein described being a preferred embodiment for the P pose of illustrating the invention.

Whatisclaimedasnewanddesiredtobe secured by Letters Patent is as follows:

1.1n a ,pool water re-circulation system, a pump having an intake and an outlet. said pump beingconnccted to the withdrawal side of the re-circulation at its intake side a'ndconnectedtothereturnsideofthercpressure-raising means therebetween,

auxiliary tank means, means for introducing fresh water into said auxiliary tank means, said as last named means being disconnected from the fluid in the system,- an overflow conduit in the auxiliary tank means to limit the maximum liquid level, and injector means fed by the auxiliary tank means, said combined with the pressure-raising means and having a throat and a suction arm connected with the throat and aconduit connecting said suction arm with the auxiliary tank to forcefully draw fresh water from said tag: when the pressureraising means is actuated, d injector having relatively small es communicating with the pressure-raising means whereby to restrain back-flow into the tank upon cessation of the action of the pressure-raising means.

. 4. In a pool water re-circulation ystem, a pump having an intake and an outlet,

said pump beingv connected to the withdrawal side of the re-circulation system at its intake side and connected to the return side of the recirculation system at its outlet side, injector means for introducing additional fluids into the systemandconnectedinanauxiliarylinearranged in parallel relationship with the pump,

a supply tank for said additional fluids, said in 00 jector being actuated by the re-circulation system to forcefully draw additional fluid from the supply tank conduit and inject it into the system, anoverflow conduit in the tank adapted to limit the maximum liquid level in the tank, and fresh as fluid supply means for said tank operated by a float ball valve whereby normally to maintain a constant level in the tank.

norm-am 1o a substantial I.

injector means being 40 

